Nueva enciclopedia tematica  el mundo del estudiante. 

 - 25th ed. 
 - Mexico  Cumbre  1979, c1976. 
 - 14 v.  ill. (some col.), maps (some col.)  26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0717250504 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries , Spanish.